 Jayakatwang then declared himself ruler of Java and king of the restored Kediri Kingdom.Among the few surviving relatives of Kertanegara was his son-in-law, Raden Wijaya, who fled to Madura Island, where he was sheltered by its regent, Arya Viraraja.Vijaya then established himself in the lower Brantas delta, where he built a settlement that would grow into the mighty empire of Majapahit.